问如何使用pygame.midi发送“持续踏板”midi信号？

EN

import pygame
from pygame.locals import *

# Midi init and setup, other code, etc...
# device_input = pygame.midi.Input(device_id)

sustain = False

# We will use the spacebar in place of a pedal in this case.

while 1:
    for event in pygame.event.get():
        # You can also use other events in place of KEYDOWN/KEYUP events.
        if event.type == KEYDOWN and event.key == K_SPACE:
            sustain = True
        elif event.type == KEYUP and event.key == K_SPACE:
            sustain = False
    # ...
    for i in device_input:
        if sustain:
            # Remove all MIDI key-up events here

    # Then play sounds or process midi input accordingly afterwards

write_short(0xb0 + channel, 64, 127 if pressed else 0);